Table 1. List of cognitive skills addressed by the games developed by the author.

Cognitive skill	Games developed by the author	Figure
Working memory	Memory and Flash Cards	Figure 3
Spatial visualisation	Caco Flies, Off Road, Shark, Beware of the Alligator, Hit the Balloons, Motocross and Number Race (1 and 2)	Figure 4
Quantity representation, using number symbols	Lost Ruins, Wrapping Gifts, Harvesting Apples and Hit the Balloons.	Figure 5
Processing continuous and discrete quantities	Caco Flies, Lost Ruins, Hit the Balloons, Off Road, Number Race 2, Dance, Dance and Dance!!, Shark, Selling Corn, Beware of the Alligator, Motocross and Wrapping Presents.	Figure 6
Reading and writing numbers	Lost Ruins, Off Road, Shark, Selling Corn, Wrapping Presents and Hit the Balloons	Figure 7
Constructing the significance of the number from its various uses in society	All of the games	All Figures
Calculation procedure development	Caco Flies, Lost Ruins, Slot Machine, Off Road, Number Races 1 and 2, Shark, Selling Corn, Beware of the Alligator, Flash Cards and Dance, Dance and Dance!!	Figure 8
Recognition of measurable quantities	Lost Ruins, Slot Machine, Off Road, Wrapping Presents, Shark, Hit the Balloons, Selling Corn, and Beware of the Alligator	Figure 9