1. Wash the avocado thoroughly, then cut it in half and remove the pit.
2. Scoop the flesh out with a spoon.
3. Mash the avocado until smooth using a fork or small blender to achieve a puree consistency suitable for a 4-10 month old baby.
4. Ensure the texture is smooth and free of lumps to prevent choking hazards.
5. Serve immediately as a cold snack, or store in a sealed container in the refrigerator for up to 24 hours.

Summary:
This baby-friendly avocado puree is a nutritious, no-cook snack designed specifically for infants aged 4 to 10 months.

Storing Options:
Refrigerate in an airtight container for up to 24 hours to maintain freshness.

Potential Allergies:
Avocado is generally safe, but introduce it gradually and watch for any unusual reactions.

Side Effects:
Always ensure the puree is adequately smooth to avoid choking hazards.