Boomwhackers — educational instruments for children, simple at first glance and surprisingly effective.
They are coloured tubes, each with its own length and colour, and each colour corresponds to a note. The child has nothing to tune: you strike the tube and out comes exactly the right note. That is why they work so well with young children — you go straight to what matters: rhythm, listening and playing together.
The most valuable part is that nobody can play the tune alone: each child holds one or two notes, and the melody only appears if everyone comes in at exactly the right moment.
About the after-school programme: https://pluskids.ro/en/after-school