Food and Toys can be found in Supply Drops. You can collect up to 4 of each per day!

Interaction items can be found in the Free Incubator in the Market. You can get 2 in each Incubator, which can be collected every 6 hours.

Be on the lookout for special events that will allow you to collect more!

Your inventory can hold up to 12 Food, 12 Toys, and 16 Interaction items.