This is the 3rd of the mini STEM puzzles (although if I’d done them in order this should have been the second – Science, Technology, Engineering, and Math). My husband and I had a great time assembling them all, and I highly recommend them.

There are only 150 pieces each, and they come in a test tube. The label serves as both a poster showing what the finished puzzle will look like, and it has a quiz on the back relating to the subject… (click on the photos twice to see a larger image)

If you enjoy working with very small pieces, or would just like to give them a try, they are definitely recommended. We had a great time with all 4 puzzles; only 1 more to go!