I ordered the 3- month gift subscription to Tinker Crate last Christmas and dd7 (then 6) really enjoyed them. However, the kits broke after a couple of uses so I decided not to extend. But they were really cool if you want to check them out. Other toys she has enjoyed are terranium, scienterrific's roller coaster science. But mostly, she enjoys doing silly science using household material- making flubber using corn starch, making the best bubble mix, etc.