Making small monthly payments, plus gifts, plus grandparents paying in, it can add up over the year. Currently in a 3% santander mini account but plan on moving over to a junior ISA. 15 years to go till the oldest is 18 so there's a lot of potential growth there.
Turning your kids into future Warren Buffets?
I agree, unless you have lots of spare cash, kids ISAs are a low priority (for me anyway).