"Why did you choose this product?"
ITEM#: 12323734This Smithsonian activity set lets you build a real working battery powered, four-cylinder model engine. The learning accessory features real lights and sounds as it lets you see how the pistons fire with the correct timing.
- Watch the belts and fan turn
- Includes, over 100 parts that screw together easily
- Detailed instructions
- Requires two (2) AA batteries (not included)
- Recommended for ages 8 years and up
- Includes 35-inch long x 23-inch wide poster
- Build a working model of a 4-cylinder engine
- Valves rock, spark plugs fire and pistons drive crankshaft
- Battery operated moving parts and lights
- 2 washers
- 2 shafts in various lengths
- 4 exhaust valves
- 4 intake valves
- 8 valve stems
- 4 piston halves
- 4 connecting rods
- 8 timing cams
- 8 rocker arms
- Crankshaft pullery
- Fan pullery and fan
- Engine mounting stand
- 5 bearings and clutch housing
- Lower crankcase
- Rocker arm cover
- Upper cylinder head
- Timing belt
- Timing wheel
- Timing gear
- Belt tensioning pullery
- Lower cylinder head
- Cylinder block
- Positioning jig
- Timing belt cover
- Intake manifold
- Exhaust manifold
- Carburetor cover
- Carburetor bowl
- Front half of water pump
- Rear half of water pump
- Flywheel clutch
- Fan belt
- Head basket
- 8 valve springs
- Distributor assembly
- Drive module
- Battery pack
- 67 screws
|Theme||Children, Masculine, School, Scouts, Vehicles|
|Country of Origin||China|
Kahootz Spirograph Design Tin Set
Guidecraft Balance Beam
Scientific Explorers Grow Colossal Crystals Kit
Dunecraft Windowsill Greenhouse Kit
Kahootz Spirograph Deluxe Kit
Guidecraft 3D Feel and Find Kids' Game (20 Matching Shapes and Tiles)
NSI The Smithsonian Electronic Crystal Growing Set
Melissa & Doug Magnetic Pattern Block Kit
Some creativity but mostly pre-assembledRead More
Bought this for my step son and he loves it. Recommend all the Smithsonian learning toys.Read More
My son worked so hard on it and did an amazing job. When he got done and we put batteries in it, nothing happened. Very disappointed.Read More
My nephew loved it!!! This was a good gift, and somewhat challenging which was good:)Read More
great gift for all ages or yourselfRead More
The engine is fun to assemble when you have all the parts needed. My recommendation is verify that all parts are included before starting the project. Maybe not such a good idea to get this toy from Overstock? Then send one email to NSI. So, far NSI International has sent us the first part and we have requested the second at the time of writing this review. My ten year old is able to assemble the engine with just a little help. There are a couple of mistakes in the instructions. On step 18, follow the sequence A,B,C,D,E,F,G and H for the camshaft but don't try to match the orientation of the parts to the drawing. Instead, A & B, C & D, E & F and G & H will point in opposite directions. Also, on step #19, ignore the drawing showing that the camshaft parts have changed sequence in that step. This was confusing to my son.Read More
not at all happy with this product. the crew alignment was off and the whole toy had gaps and didn't fit nicely together. never got it to work properly... most likely because of the alignmentRead More
detailed,realistic. Can see operating parts inside a 4 cylinder overhead cam engine.Read More
I ordered this for my 11 year old grandson. He was so excited perfect gift!Read More
Camshaft pieces were missing. I had all 8, but instead of all being different I had a mismatch of 4 of the same, 2 of the same ect. Many pieces already had cracks out of the box and while installing screws usually cracked and not from over tightening, like half way in they would crack. Pieces were badly molded and featured a lot of parts needing deburring before they could be assembled, Instruction illustrations were very poor and incomplete leading to confusion on many steps and having to look at all the other steps to see proper orientation. Several times these were even inconsistent. My daughter got frustrated with this and rightfully so. I'm a mechanic and I think it's garbage. Buy the visable V8 for another $10 it is a lot better made. Still waiting to hear about the missing cam pieces, probably be thrown away....beware.Read More
Questions & Answers
It will be perfect for my 13 year old grandson.
Daughter is interested in science and mechanical items.
My six year old boy loves building things
for my son
My grandson is very inquisitive and analytical. Although the internal combustion engine may be obsolete within his lifetime, I feel that every young man should know the principles and physics of how it works.
For a family member
price and educational
I have a grandson who is very curious.
Shopping Tips & Inspiration
Best Educational Toys for Christmas
Engage your young ones with fun, interactive, and educational toys this holiday season. When you gift the appropriate toy for your child's age and developmental level, you can stimulate creativity, boost confidence, and increase skills and knowledge.
Create a space for learning and fun. Check out these playroom ideas for your home. Shop our huge selection of baby & kids’ furniture at Overstock.com.
Best Educational Toys for Children 4 Years and Older
Best Educational Toys for Children 4 Years and Older from Overstock.com. Kids who are 4-years-old and older know learning can be fun, so help them with the best toys for learning.
Best Toys for Children with Learning Disabilities
Best Toys for Children with Learning Disabilities from Overstock.com. No matter what learning disability children may have, toys for learning are available to help them.
Best Games to Improve Listening Skills for Kids
Best Games to Improve Listening Skills for Kids from Overstock.com. Many educational toys and games can help children develop better listening skills. Here are the best ones to look for and give to your kids.
Best Gifts for Tweens for Christmas
Buying gifts for tweens is fun because at this stage their interests are deepening, growing, and changing. We've created a list of the best gifts for tween girls and boys to help you get the ideas flowing.
Best Pretend Play Toys for Christmas
Pretend play helps kids express their feelings and develop language skills, and it provides opportunities for social development. Children should direct themselves to get the most out of imaginative play, but you can help jumpstart their creativity with the perfect gift. Read below to find the best pretend play toys for your child this Christmas.
Best Toddler Toys for Christmas
We've come up with a list of the top toddler Christmas toys for both boys and girls that will bring learning and laughter for years to come. These toys will help your child explore their world and expand their imaginations.
Best Toys for Boys for Christmas
Whether you're shopping for the perfect gift for your son, grandson, or nephew, you'll want to give him something that will spark his creativity and provide hours of fun. When you're Christmas shopping this year, be sure to put a few of these top toys on your list.
Best Ride-On Toys for Christmas
From rocking horses to small-scale motorized cars, ride-on toys not only satisfy a young one's need for speed, but they also encourage outdoor activity and build confidence. If you're looking for ideas for the little ones on your Christmas list, consider these suggestions to find a perfect gift.
Shipping & Returns
Usually leaves our warehouse in 1-2 business days. *
Our standard shipping method is ground shipping. We also offer expedited shipping for most items. Your final
shipping cost and estimated delivery timeframe will be available at checkout.
Standard shipping details
Expedited shipping details
Standard Return Policy:
Items must be returned in new or unused condition and contain all original materials included with the shipment. More Details
FINAL SALE EXCLUSION: Items marked as FINAL SALE are not returnable unless the problem you experience is the result of our error.
For your protection, all orders are screened for security purposes. If your order is selected for review, our Loss Prevention Team may contact you by phone or email. There may be a two business day delay to process your order.
** Most Oversize orders are delivered within 1-4 weeks. Some orders may take 6 weeks to be delivered.