sconeonamission - if you want your ds in a booster seat that's for 4yrs+, then you'll have to wait until August. You'll need to look for something that if from 2yrs-7yrs (Maxi Rider, a few of the Infa Secure brands to name a couple). Shop around, KMart will have some, speciality stores will have others. Check out the Infa Secure & Safe n Sound websites and then see where their stockists are to save time looking in the shops. As for price range, anything from probably $120-$400.