| Brand | Nienhuis Montessori |
| Material | Birch plywood, Beech, PVC |
| Minimum age | 3 years, 6 years |
| Inside or outside | Indoor |
| Color | Wood, Assorted |
The grammar symbols help to sensorially reinforce each part of speech. There are 15 different symbols, each representing a specific part of speech. The symbols are made from heavy plastic and are stored in a wooden box with lid.