What do you decorate the cages with for the mouse?
I usually find most of my mousey things on second hand shops. My favourite is teapots! My mice love to nest in it and if it's porcelain or glass you can easily keep it clean and fresh.
Other favourites I use to find in second hand shops are ornamentals they can climb around and hide in, porcelain lanterns are also popular among my little ones.
I live near the forest so I often bring in sticks and build toys from the nature. There's easy to build ladders, bridges and even houses, safe to chew on.
Do you have any tips of enrichment for the cage?