2. Elephants

3. The truth comes out.

4. Seals (poster)

5. Because puppies only have puppies.

6. It's peanuts because of peanuts! ! ! !

7. The first step, Xiao Ming took his younger brother across the bridge, and Xiao Ming came back, which took 4 seconds; In the second step, Xiaoming crossed the river with his father and his younger brother came back, which took 9 seconds. The third step, mom and grandpa cross the river, and Xiaoming comes back, which takes 13 seconds; Finally, Xiao Ming and his younger brother crossed the river in 4 seconds, with a total time of 30 seconds. How thrilling!