Product Size: base 70X90X230MM accessories: a small black box (magnetic inside), two 14MM beads/8MM bead 3 PCs/6MM bead 3 PCs/3 aquatic plants/6 fish function: Put some metal fish, beads and aquatic plants on the small black box, and you can put them according to your own ideas. Your space is up to you, and you can pile them as you want, 2 fish, 3 Fish,  the combination of 6 fish is good or can you put it according to your own ideas.