Sure, here are 9 sentences suitable for 2nd graders:
1、I like to play with my fluffy cat every day.
2、The sun shines brightly in the sky during the day.
3、My favorite color is blue like the ocean.
4、We plant seeds in the soil to grow flowers.
5、Birds chirp happily in the trees in the morning.
6、I read a book about a magical unicorn.
7、The tasty pizza with cheese makes me smile.
8、I ride my bike in the park with friends.
9、The big brown bear sleeps in the cave during winter.