What are good toys for 8 month old??

My son is almost 8 months.. He sits and almost stands.. He loves grabbing everything and puts it in his mouth and he throws things.. I got him a ball pit which he loves.. His Exersaucer and jumper he loves.. He has a beatbo. And laugh and learn teddy bear.. He has rattles and other little toys stuff.. Can any of you moms recommend some good toys that are also good for development. He will be staying with my mom while I work and want to get different toys for her house.. Please! Give me recommendations! I went to toys r us and they don't know 🤔 n I don't want to spend money on just anything!!!  Thank you!