1. Begin by preparing the rice according to package instructions if it’s not pre-cooked. Once cooked, let it cool slightly.
2. While the rice is cooling, carefully peel and dice the papaya into small, manageable pieces for your toddler.
3. Peel the tangerines and separate them into segments. If the segments are large, you may cut them in half for easier handling.
4. In a large mixing bowl, combine the cooked rice, diced papaya, and tangerine segments.
5. If using, sprinkle a pinch of cinnamon over the mixture and gently stir to combine all ingredients without mashing them.
6. If the mixture seems too dry, add a small amount of water to achieve a slightly sticky consistency that is easy for little hands to pick up.
7. Once mixed, you can form small balls (about the size of a golf ball) or leave the mixture as is for your toddler to explore and self-feed.
8. Place the rice snack bites on a plate, and let them set for a few minutes before serving.

Summary:
This Papaya and Tangerine Rice Snack is a delicious and nutritious option for toddlers over 10 months old. The combination of soft, ripe fruits and wholesome rice provides essential vitamins and fiber, promoting healthy digestion and energy. The recipe is simple and requires minimal cooking, making it easy for busy parents. You can store any leftovers in an airtight container in the refrigerator for up to 2 days. Always ensure that fruits are fresh and suitable for your child's dietary needs to avoid any potential allergies. Avoid using too much seasoning, as toddlers typically prefer simple flavors. This snack encourages self-feeding, aiding fine motor skills development.

Storing Options:
Store in an airtight container in the refrigerator for up to 2 days.

Possible Side Effects/Allergies:
Always ensure that fruits are fresh and suitable for your child's dietary needs to avoid any potential allergies.