what kinds of treats would you recommend for rabbits

When I had a rabbit, she loved anise/fennel, parsley, apples, pears, and raspberries. You could also try other herbs like basil. Fruit (e.g., apples, pears, strawberries) should only be given in small amounts (about a level tablespoon a couple times a week). Whereas other respondents have suggested carrots, I would only recommend giving the carrot tops since carrots are high in sugar and sugar is something your rabbit should avoid (although rabbits are known to have a "sweet tooth"). Anise/fennel can be expensive to purchase at the grocery store, so you might want to try growing your own this summer!

Fresh green grass and carrots are healthy and rabbits love to nibble on them all day.

raw veggies

Timothy hay is a great every day treat. Greens like dandelion, salads, and grass are also good choices. Only give small amounts sugary vegetables or fruits because too much may cause obesity. Cereal grains (about 1 teaspoon per day) could also be given.