Stepping stones for toddler?

[wishIwasonholiday10]

I've heard stepping stones are a good toy to help develop toddlers gross motor skills so was thinking of buying some for my DD who has a gross motor delay. Does anyone have these and is there much difference between the really expensive ones from Stapelstein (~£150 for 6) and Play Factory from Smyths (£25 for 6)?

I dont have the stepping stones but have other soft play type stuff from smyths and they are great. Might get stepping stones next.my son is 4 but has severe delays and cerebral palsy