Bobby Bot is a child friendly voice assistant app that allows kids to listen to child friendly stories; nursery rhymes; jokes ask math or general knowledge question and even do small talk.
App also works in conjunction with kiddoware other parental control apps like Kids Place and Safe Browser so that kids can use voice commands to open apps; watch YouTube videos and websites using existing parental control rules.

Some of examples of commands/questions you can ask bot:
Tell me a story?
What is 17 times 8?
Tell me a joke?
Can you sing me a nursery rhyme?
Open Minecraft app.
Spell gracious?
What is the meaning of crater?
Who is Harry Potter?
What is Grand Canyon?

Below is the link to app's user guide: http://kiddoware.com/kbot-user-guide/