Fun set of Spy Pens. Each box contains 2 pens with invisible ink! The ink is revealed using the light in the pen cap. Trust me these are such a great way to entertain the kids (and the adults!!). These are brilliant stocking and party bag fillers.
- Each pen uses 3 LR41 Lithium batteries which can be replaced by unscrewing the top section of the pen
- WARNING! Choking hazard, small parts, keep away from children under 3