1 Dab several hues of green paint onto your palette and use a paintbrush to mix in a bit of water. You want the paint to be neither too thick nor too watered down.
2 Paint one side of a pebble green using a wide-tipped brush. Lay it on its unpainted side to dry on a sheet of newspaper.
3 Once the pebble is completely dry, turn it around and paint the other side. Repeat with the other pebbles.
4 Use a fine-tipped paintbrush to paint white polka dots and dashes on the dry green pebbles to represent thorns. Leave to dry thoroughly.
5 Fill your pot or bowl with soil or sand, depending on what’s easily available.
6 Place the ‘cacti’ pebbles in the pot so that they’re slightly submerged in the base.
7 Store your terrarium indoors and show it off to guests!