Totally normal lah, don't worry! At 7 months, babies are starting to understand the world around them and realize they have preferences, so when you take away the toy or try to feed them something they don't want, they're basically saying "I have an opinion about this, Mama!" A few of my mum friends said their babies did the same thing around this age, and it actually means their brain is developing nicely. The best thing is to give him choices when you can (like offer two toys instead of forcing one), respect his cues when he's done eating, and stay calm when he fusses, these mini tantrums will pass, and you're doing great by recognizing it's just him exploring his independence.