A bundle is like when you take a bunch of your favorite toys and put them in a big hug with your arms. You hold them all together so they stay in one place, just like when you wrap a blanket around you to stay warm. Everything in the bundle is close together, keeping each other company.
Think of a bundle like a bunch of flowers tied together with a pretty ribbon. Each flower might be different, with its own color and shape, but when you tie them together, they become one beautiful bouquet. They look nice together and make you happy when you see them.
A bundle can also be like your favorite snacks all packed in one lunchbox. You have a sandwich, an apple, and maybe some cookies, all in one place. When you open your lunchbox, you have everything you need for a yummy meal.
So, a bundle is just a way to keep many things together, safe and sound, so you can enjoy them all at once!