DS needs some stimulating toys to hang from his activity mat. He does not like most of the stuff that I put up there.

He only seems to like this small beach ball thing with a ball inside and this.. (i take it off the suction cup and put a link on it and hang it he can grab it and it moves and plays a tune)
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I need some ideas. Anyone know of something that he can grab and that maybe plays music or makes a noise? He plays with the same 2 toys on there everyday

eta: DS is 3 months