Hi
Have you tried making up a weekly planner? You don't have to rigidly stick to it but it will give you an idea of things to work around.
I pinch ideas from playgroup, nursery and school to adapt for my younger children.
Lots of songs and rhymes - have you got a local toy library and story sack group? Get in touch with your local childrens center, see whats on a your leisure center or play activity places or library ( you can hunt down entertainment books too) Halve you toys and put one half away and rotate them (or perhaps that only works in my house seeing as I could give Toys r us a run for their money lol)

Pick a theme for the week and work around that. Don't forget free play time too.
If you have a garden how about some sand and/or water play now the weather is good?