It can take some time to identify what they’re into. When you’ve noticed her being busy is she digging, chewing, arranging things? Not all get into play. You may notice she is pretty low key during the day and has burst of energy at certain times.
I’ve found my rabbits like cardboard boxes to investigate, hang out in amd occasionally chew. Also, if I fix things down they’re more likely to chew at them then a chew toy. I have some baby toys for them but they rarely get looked at. Sometimes they’ll toss them. I found in SA that Cunninghams warehouse, and now in Coles too, there is a bare willow basket for about $7. Some like to chew these or hide under them. You can also try get pesticide free apple wood or some willow as big chew sticks.
Have a look in the Toy section under Bunny Info at this site. There’s some homemade ideas there.
Another Aussie member posted recently for some sites to get rabbit toys too. I’ll try find that and the site that was recommended to her.
Edit: ok, she posted about this site: http://www.petcityonline.com.au/products-main.asp and another member recommended this one peninsulapetsupplies.com.au
Hope that helps some.