We have emergency services stickers with cool fire engines and ambulances.
J was dry overnight then did wees in the toilet. Then he got dressed, including asking which drawers his clothes were in and finding them for himself.
I am running out of stickers!
*Edited to add. Tonight he did poos in the toilet even though he already had his nappy on, went to bed beautifully and was miraculously asleep by 7:40... but we used the last ambulance!