It’s 3D puzzle. When I visited to my aunt’s house, I saw a broken pieces of puzzle. So I assembled parts of puzzle to make a sphere.
It’s very easy because there is a printed number behind each piece of puzzle. However there is a hard point! When I assembled this except 3 pieces, I can’t attached two things. Because whenever I connected piece by piece, I can grip the piece front and behind. But last one couldn’t be done.
Then my cousin’s son did make the sphere! He just did very carefully. At that time, I thought it’s like a challenge for me. So I took a picture this to remember that.^^