Pick a part in the palette and click on the grid to place it. Parts snap to the 8 mm hole grid and seat 1.5 mm into whatever they touch, just like the real blocks.
The JSON below is the whole build: parts, steps and step text in every language. Paste a build (or a translated CSV) here and press Load. Your work is also autosaved in this browser.
| Click a part, then click the grid | Place it. The ghost snaps to the 8 mm grid and seats 1.5 mm into the surface under the cursor. |
| R T E (+Shift) | Rotate 90° about world Y / X / Z. Works on the ghost before you place it and on the selection afterwards. |
| Drag · ↑↓←→ | Move the selection. Arrows nudge by one 8 mm hole row relative to the view. |
| ▲▼ beside the selection · PgUpPgDn | Raise / lower by one hole row. Shift = 16 mm stud pitch. The 1 mm toggle (or Alt) for fine moves. |
| W then click a surface | Set a build plane at that height (seated 1.5 mm in, or exact with the checkbox). Click the floor to reset. |
| Shift+click · right-click | Add to the selection · context menu. |
| Ctrl+D / G / U / Z / Y / S | Duplicate · group · ungroup · undo · redo · file. |
| Delete · Esc | Delete the selection · cancel placing / clear the selection. |
| Drag empty space · scroll | Orbit · zoom. The red axis is X, the blue axis is Z (matches the Tip buttons). |
| Make steps | One step per part, bottom-up. Type each step's text straight into the list. Later presses only add parts that have no step yet; Re-sort starts the order over. |
| 📷 on a step | Save the current camera as that step's printed view (used by the booklet only; students orbit freely). |
| P · ← → · S | Toggle the player · previous / next step · turn read-aloud on or off. |
| ? | This panel. |
In the print dialog choose Save as PDF to get a file, or print directly. Pages fit both Letter and A4.