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Experiments themselves are great, but the measurements and instruction accuracy are lacking. Instructions give you a 5/8” measurement from outside edge of wood to inside edge of the plastic guardrail. Doing that leaves no hope of getting the wooden block train with coin spacers in. You need more like 12” in from each edge. Easy enough to adjust, but the plastic fences are bowed and misshapen so they are not a consistent width. I would have been better off to make myself, but it did save time sourcing the materials. Would recommend looking elsewhere. This is an extremely overpriced kit.
Noté 5 sur 5 étoiles.
Our daughter-inlaw said this kit will be beneficial for her home schooling science class.
Noté 4 sur 5 étoiles.
My 6 yr old liked this