Abs - do your deep breathing, push against a solid structure, exhale as you push against it and focus on your abs.
Power walk with or without the buggy - if not much time, power up a hill 6 - 8 times!
Go for short sharp run (my more post natal ladies) - literally 20 mins, with a 5 min easy, 10 mins really pushing it or running up & down hills & then 5 min easy.
Then eat some nuts - no not the dry roasted ones!! Almonds, brazil, hazelnuts, pecans, they are all great for you - just avoid eating the whole bag!!
Or eat some eggs - excellent source of nutrition & will fill you up for longer.
Or eat a couple of oatcakes with pure, organic peanut or almond butter, or tinned mackerel or pilchards. Quick easy post exercise or even pre exercise snacks.