Swimming pool is also good-there's usually kids playtime there.
Have you thought about a regular class for her? Maybe swimming, dance, football?
Mine like to collect things on a walk like sticks, leaves, petals, seeds, feathers etc and make a mini collage.
Pond dipping/rock pooling is a favourite too.
There's loads of kids nature books too if you wanted to show here what's out there and learn a bit about nature...why we don't pick flowers, why we don't stand on mushrooms, the seasons etc
We make the most of any outdoor space as it's free and it gives our dc a chance to run around. I find mine eat and sleep better after being out for a few hours too.
There may be some events coming up for valentines, Mother's Day and Easter near you? Crafty things, egg hunts, make a card for your mum/grandma etc.
Look up your local library/sure start centre/park they should have info there.
Plant some seeds/bulbs/fruit/veg outside or even inside with some.
The rspb website has some great ideas for making homes for nature too.
Have fun!!