Biomolecular engineering is all about making tiny things, like molecules and cells, do stuff that we want them to. Kind of like how you can use LEGOs to build things, biomolecular engineers use different parts of cells and molecules to build really cool things too.
But, instead of building towers and race cars, they use these tiny things to create things like new medicines, better materials, or even to make food taste better! They do this by changing the way that cells and molecules work, and making them do the things we want them to do.
Imagine you have a big bucket of LEGO pieces, and you want to build a castle. You would start by finding the right pieces and putting them together in the right way. That's kind of what biomolecular engineers do, but instead of LEGOs, they use different parts and pieces of cells and molecules.
By changing and combining these parts, they can make new things that do amazing stuff. Once they've built what they want, they test it to make sure it works like it's supposed to, just like you test your LEGO castle to make sure it stands up and doesn't fall apart.
In the end, biomolecular engineering is an amazing field where people get to use science and technology to create all kinds of cool things that help make the world a better place.