I buy these as a go-to chew: CHUHUAYUAN Natural Apple Sticks,... https://www.amazon.com/dp/B08PNT18NL?ref=ppx_pop_mob_ap_share

Also, buy something like this and stuff it in paper towel rolls or boxes left over from snacks or something: Boxusa 15"x65' Honeycomb Wrapping... https://www.amazon.com/dp/B0B775NG31?ref=ppx_pop_mob_ap_share

Full tissue boxes with the plastic removed are another cheap and easy toy.