The Father in Law has bought loads for the grandkids, my niece has won over a grand in 7 years, but she did start with a gransd worth which built up to 10 grand, my 5 yr old Adam has won over £200 from 2 grands worth and the 3yr old Ben has won over £100 on a grands worth. Since Oct the wife has won £75, Adam has won £50 and Ben £25.
They've now all got £10k in premium bonds, he upped them all in Oct when he had a heart scare.