Preheat your oven to 400 °F and line a baking sheet with parchment paper.
In a large bowl mix together the flax, chia, sunflower and pepita seeds.
In a separate bowl whisk together the 1 cup of water and spices.
Pour the spiced water mixture into the bowl with the seeds and use a spoon to stir until combined.
Dump the seed mixture onto your baking sheet and use your hands to push down the mixture and spread it to be about ¼ - ⅛ of an inch thick. My mixture spread all the way to the edges of my baking sheet.
Score the dough with a knife into whatever shape you like.
Bake in the oven for 25-30 minutes until dry and firm. (It depends on how thick/thin you made them)
Break the crackers apart and let cool.
Notes
These will keep for 2-3 days in an airtight container. After that, the texture changes.