A father allowed his son to feed a row of open-mouthed hippos at a zoo in Egypt in this adorable clip.

Filmed on May 6 at the Giza Zoo, the hippos patiently wait with their mouths open for a visitor's son to be lifted and drop some grass for them.

Giza Zoo has a controversial reputation regarding allegations of abuse, neglect and poor care for their animal charges.

father was busy with son feeding Hippo animals , they got fascinated by grass , they are well trained for visitors to feed them , they spend much time in water every day .Hippos are happy when they see children feeding them , they enjoy eating and always asks for more grass as they got their mouse opening asking for more every time , lazy fat hippo always wants people attention every where