Minecraft coding classes for kids in Germany

Source: USK title search for Minecraft, usk.de, read on 3 November 2026. The search returned 81 titles; spin-off games such as Minecraft Dungeons II carry their own, different ratings.

# A stepped pyramid, built layer by layer like a Minecraft agent would (our own example)
def build(base, hollow):
    blocks = set()
    layer, side = 0, base
    while side > 0:
        for x in range(layer, layer + side):
            for z in range(layer, layer + side):
                edge = x in (layer, layer + side - 1) or z in (layer, layer + side - 1)
                if not hollow or edge or side == 1:
                    blocks.add((x, layer, z))
        layer, side = layer + 1, side - 2
    return blocks

def by_formula(base):
    # a quick guess: each ring of side s has 4 walls of s blocks
    return sum(4 * s if s > 1 else 1 for s in range(base, 0, -2))

print("Solid pyramid, base 9:", len(build(9, hollow=False)), "blocks")
print("Hollow pyramid, base 9:", len(build(9, hollow=True)), "blocks")
print("Formula for hollow, base 9:", by_formula(9), "blocks")

The two counts disagree: 81 from the program and 97 from the formula. One of them is wrong, and the program has the advantage of having actually placed every block. So where does the formula go wrong? Draw a ring of side 3 on squared paper and count: 8 blocks, not 12. Each corner block belongs to two walls at once, and the formula counted it twice. Four corners per ring, four rings with corners in a base-9 pyramid: 16 blocks too many, and 97 minus 16 is 81.

def by_formula_fixed(base):
    # four walls of s blocks share four corners, so take 4 away
    return sum(4 * s - 4 if s > 1 else 1 for s in range(base, 0, -2))

for base in [3, 5, 9, 15, 21]:
    built = len(build(base, hollow=True))
    print("base", base, " built:", built, " old formula:", by_formula(base), " fixed formula:", by_formula_fixed(base))

Example and program written by us; output taken from a Python 3 run on 3 November 2026.

Now look down the "built" column: 9, 25, 81, 225, 441. Those are 3 times 3, 5 times 5, 9 times 9, 15 times 15 and 21 times 21. A hollow pyramid always needs exactly as many blocks as a flat square floor of the same base. Children are usually delighted, and a little suspicious, which is the right reaction. The older ones can prove it by adding up the rings; the younger ones can test it in the game. Either way they have learned the habit this example is really about: when two ways of counting disagree, do not pick the one you like, find out why.

1. Predict. How many blocks will a hollow pyramid with base 31 need? Check with the program.
2. Solid too. Write a formula for the solid pyramid and test it against the program for five sizes.
3. Add a door. Change the program to leave a gap of two blocks in the bottom layer. How many blocks now?
4. In the game. Build the base-9 hollow pyramid with code and count the blocks used in your inventory.

Germany uses MEZ, UTC+1, in winter and MESZ, UTC+2, in summer, as set by the Einheitenzeitgesetz; the change back was on 25 October 2026 and the change forward is on 28 March 2027. India stays at UTC+5:30. The rows are examples; no batch time is fixed here.

When you book the free class, slots appear in your own local time. Young children often do better with a weekend morning class, when they are fresh, than late on a school day.