I just worked with 6 and 7 year olds in first grade in the US.
Try looking up teachers' websites to find ideas-there are tons of ideas out there for that age. I'm sure you could find some simple games-you could find card games, simple math games, or games you could make yourself with just a few pieces. (or that they could help you make, coloring in their own game board, making their own pieces, if you gave them a template).
I'd also look into having them build something indoors. Also, if you had the giant rolls of paper, they could trace each other, and color themselves in. I totally understand that boys at that age are super active. But I've noticed they love feeling like they made something 'cool'. Maybe you could shift some of your crafts towards their interests.
(My male students were obsessed with the new cartoon version Star Wars, lol ).
And all the kids loved reading/learning about animals-especially if it involved strange and amazing facts about how strong/big/tough they are. You could pick some and help them have a theme for their games or activities.
I also taught my kids about space, and they loved drawing all the planets. It was pretty tough for them to understand-mostly it was how some are different colors, hot or cold, and their names. They also thought it was funny to learn the order by the memory trick- my very excellent mother just served us nine pizzas. ;-D
Here it is typical at that age to have centers set up during reading instruction-my teacher had different ones depending on the week, but they included- tracing words into play doh using letter stamps, making books with vocabulary words they knew, (making a book is always fun when they get to decorate it) simple matching games like memory with cards turned face down, a listening center where they listened to books on CD, computer center set to educational kids sites like starfall.com, and games matching words to their endings (-ing, -ed, -s) as well as contractions. (do not matches with don't).
Obviously I know you are entertaining them more so than teaching, but I just wanted to give you the ideas I'm familiar with, and you could alter them to be about just about anything.