A Veritable Almanac!
A very simple to make boat with the use of a power jigsaw or the more painstakingly labourious coping saw.
Stick the boat template on a suitable piece of wood and cut around it.
For the paddle I cut to size a piece of thin perspex I had to hand and glued the elastic band to the centre on both sides.
If you make several of these boats they should be numbered and have a competition to see whose goes the furthest.
All that remains is to wind up the elastic band, find a suitable stretch of water and launch your boat!