The colony is doing great: expanding really fast, the baby boom have just started started

.
They've got about 300 workers. And almost 1 test tube full of breed.
The majors are also growing. The first major was a little larger than an worker. But the new majors are almost 2 times the size of an normal worker!
I give the colony grass and bird seeds. At the moment they only eat grass seeds, I guess they're easier to eat than the bird seeds. I also give them some insects, but not plenty of them. It's much easier to give them seeds and they seem to do fine on them. I give them about 1 insect a week.
They house in 3 test tubes and use 1 small test tube for storing seeds. Seeds are also stored a few long rooms. They've dug many roads and rooms in the (dry) sand. The Queen usually houses in the centre of the sand basin.
The outside world is used for dropping sand. The peace's of sand become bigger and bigger (±4mm), guess that's the work of the Majors.
Messor Barbarus was in the beginning an little bit boring. They are really easily afraid. With the smallest vibrations (a door being closed hard) they start running towards the nest. luckily they became braver with the growth of the colony.
I've filmed the colony and I'll post an YouTube link soon.