PHOTOS: Heidi Klum is Pregnant and Playful

Heidi Klum may have enjoyed playing ball with her son Henry yesterday, but the supermodel is so pregnant, it looks like she's trying to hide a huge ball underneath her tank top!

Henry and the mom-to-be were joined by his fellow siblings, sister Leni and little brother Johan, as Heidi's trio of adorable kids frolicked at the L.A. park.