How does a phone actually work? How are sound waves transmitted? Physical laws are easily understandable with the speech tube fera made by stilum, when children are spaced from 10 m to max. 30 meters and talk to each other.
|Equipment dimensions:||630 x 460 x 1400 mm|
|Maximum height of fall||—|
|Minimum space:||5545 x 1400 mm|
|Safety surfacing area:||—|
|Required safety slabs:||—|
|Recommended surface material:||optional, the ground should be smooth and free of edges.|
|Safety:||DIN EN 1176|
|Coating:||Coloured granulate rubber coating|
|Age rating:||from 2 years|
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