She's a cutie!
Mine like to toss stuff around as well as rolling the balls. Short chunks of pvc pipe is fun and cheap, 1" and 2" works well. The babies like to crawl through 3-4" pipe, too.
Sea grass knots are also a big hit, though they don't last long - they smell great, though. Bundles of hay stuffed through toilet paper cores. Twisted brown packing paper.
Whiffle balls of varying sizes.
I try to switch toys out, they like new things.