Here are the answers to the kid's puzzles.
Sloth:
7D. Arboreal 1A. Algae
6D. Predators 3D. Sluggish
2D. Sweats 9D. Pygmy
4D. Leaves 3A. S. America
5A. Nocturnal 8A.
Solitary
Elephant:
9D. Ivory 5A. Tusks 7DI.Trunk 8A. Africa
10D.Asia 3D. Ears 3A. Elephantidae 1D. Social
4D. Mahout 11A.Swimmer 6D.
Savannah 2A. Skin
Giraffe:
5D. Standing 11A.
Calf 6A. Fingerprint 2A. Ossicones
5A. Snort 8D. Africa 7D. Seven
4D. Tongue
1D. Hoof 3D. Fighting 9D.
Necking 10A. Acacia