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The Midi beads are pretty small but every child is different. I think Goblin and DG are roughly similar age/stage and DG can thread small beads but for placing on the boards she’;s better with the Maxi as the Midi is very fiddly. MG although older also needed the Maxi to start with because she needs to build her confidence in new things. But as you say, if you do think they’;re too small, they’;ll keep! Have fun!