Here is a great website with lots of ideas:
Why not try to:
Build a reading den
Make a sock puppet or puppets and write your own play
Write a song about your favourite subject
Read aloud to someone
Design and make a homemade board game
Build a tall tower - from LEGO or blocks, cushions or whatever you can find
Design and make an obstacle course at home or in the garden
Improve your photography skills, take a photograph of your favourite toy in different places using different filters
Draw your view and improve on it
Start sketching
Create a collage from found objects around the home. make different shapes and patterns - make a face, a garden, an alien...the list is endless
Practise some yoga moves, build up your core strength by practising daily