Put toys or dog safe food items into a plastic bowl. Freeze overnight  and Serve outdoors

Fold a towel in half then

roll treats into it and allow the dog to unroll the towel to find the reward

Create a crackle toy

(add a few popcorn kernels or rice for sound)

Use household objects to create "obstacle course" for your dog

Snuffle ideas

to encourage your dog to use it's nose

Use old clothing or fleece

to make dog toys