We're having great fun with our elf for the first time this year. DS1 is 3.8 and loves discovering what cheekiness the elf has been up to in the morning.
Most surprising of all has been dh's attitude - he was really sniffy about the whole idea and thought it was ridiculous. However he's really getting into it and keeps coming up with new ideas, he even went out in the middle of the night to set up the elf in the car 
How are you all getting on and what's been the most successful 'mischief' the elf has caused so far?