Chia seeds and ground flax seed are unable to be activated at home as they have gelatinous qualities, meaning when they're soaked in water they expand, absorb the liquid and form a thick texture, so are unable to be drained and dried after. However, soaking them in water still makes them easier to digest and increases the availability of the nutrients. The instructions to activate whole flaxseeds are listed above. However, you can buy ground flaxseed pre-activated and sprouted for convenience (UK Link/US Link).