Yes! Osmo has two kits that are designed specifically for children aged 3-5. These kits are:
The Little Genius Starter Kit and
The Little Genius Starter Kit Plus
Also, the Osmo Monster app (part of the Creative Starter Kit) is designed for ages 4-11.
*Note that the Osmo game pieces are a choking hazard, and are therefore recommended for ages 3+ and not younger.