A great and free alternative is to supply some willow or
apple wood twigs, they will love chewing of the soft bark and eventually even eat the soft wood itself.
Not exact matches
Piles of
twigs (natural
wood — willow, beech, hazel or
apple) make platforms for them to explore or rest under.
Drop in toilet roll or kitchen roll tubes to run through, as well as
apple wood or other fruit tree
twigs to gnaw on.
Things like
twigs from an
apple tree, or corn - on - the - cob are cheap ways to keep the teeth down, but if those aren't available, you can buy scented and colourful
wood blocks for your hammy to chew on.