Here's the corrected version of your text with improved grammar and clarity:
With one of our smart tablets, children can enjoy touchscreen fun without a screen. Instead of a regular screen, they have big, colorful buttons that you can press. When you press a button, you can hear sounds, songs, or even answer fun questions.
The tablet comes with lots of exciting games that help you learn important things like numbers, letters, and shapes. As you play, happy songs and fun sounds make you smile while you learn. The best part is that you can explore on your own. Try different games and activities whenever you want.
This version improves flow and removes unnecessary commas, making it easy and engaging for an 8-year-old to read and understand.