Well made version of a classic toy. The cleverly hinged wooden sections click over with a perplexing movement. There's a neat trick you can play with your Jacob's ladder which will baffle children (and most likely their elders): Fold up a £5 note into a small rectangle & tuck it under one of the tapes. Then operate the toy. The note will successively disappear appear disappear & so on for no apparent reason. Large & colourful version. 19 cm.