The phrase "Learn ABCs with Boo Bear" is grammatically correct and easy to understand. If you want to make it a complete sentence, you could say, "Learn the ABCs with Boo Bear." Adding "the" before "ABCs" makes it a bit clearer. For example:
- Learn the ABCs with Boo Bear.
- Let's learn the ABCs with Boo Bear!
These sentences are perfect for a 6-year-old and are clear and inviting for children learning the alphabet.