Recreating a meal at home

I went to Sanrio Puroland recently with my nieces (would highly recommend if travelling with kids under 10). We all got a bento box for our lunch (I did, too, even though it was a kids meal – I wanted the box!). They loved the food. I was just wondering how I can recreate this at home?
The second picture is what’s in the bento box. I’m assuming the rice is plain with the seasoning on top? How do I make the croquette? What kind of sausage is that? (And how do I get the picture on the croquette and sausage? This one isn’t a big deal, I just thought it’d be cool)
Any help would be really appreciated!!