baby undoing nappies

My 14 month old daughter has started un-velcoring her nappies, even through her clothes. Has anyone else had this? what did you do? did they grow out of it? I dont know whether its worth buying some wraps with poppers to use - i'm using the pop-ins so its an AIO system - but i thought i could probably bodge it with some different wraps as closeparent dont have any popper wraps. help!!