1. Rinse the millet under cold water in a fine-mesh sieve until the water runs clear.
2. In a medium saucepan, combine the rinsed millet and water. Bring it to a boil over medium heat.
3. Once boiling, reduce heat to low, cover the saucepan, and let the millet simmer for about 15 minutes, or until the grain is tender and all the water has been absorbed.
4. Remove from heat and let it sit covered for an additional 5 minutes to steam.
5. Fluff the millet with a fork and allow it to cool for a few minutes.
6. In a mixing bowl, combine the cooked millet and finely chopped pineapple. Add olive oil and a pinch of cinnamon if using, mixing well until everything is evenly distributed.
7. Using your hands, form small bite-sized patties or balls from the mixture. You can make them as big or small as you prefer, but bite-sized is best for little hands.
8. Place the millet bites on a plate or baking tray.
9. Optionally, you can lightly grill or pan-fry the bites in a non-stick skillet over medium heat for a few minutes on each side until golden brown. If you choose not to fry them, they can be served as is.

Summary:
These pineapple millet bites are a nutritious snack ideal for toddlers over 10 months. They are rich in fiber and vitamins from the pineapple, promoting healthy digestion and a variety of flavors. The small size encourages self-feeding, aligning perfectly with baby-led weaning practices.

Storing Options:
Store any leftovers in an airtight container in the refrigerator for up to 3 days. Reheat in a skillet or microwave before serving.

Possible Side Effects/Allergies:
Be mindful of any allergies; while pineapple is rarely allergenic, as with any new food, introduce it gradually.