My father has very kindly wrote a cheque for £10k each for my 2 boys (8 & 5yrs) I'm looking for advice with what to do with this. They both have a basic savings a/c with Lloyd's. Looked at Juniour ISAs but they have a £4K max investment pa. need to cash cheque in ASAP but not sure what to do for best. Would prefer an option for them not to access until 18 or 21. Any advice please 