I plan to do those exact three guides this year with my three little ladies although my oldest will be 7.
I will be doing a staggered start. I'm actually starting Bigger next week with my oldest at a very slow pace to teach her some of the basic skills in the beginning of the guide since she is on the young end of the guide. She's definitely ready for it, I just need to adjust her pacing.
My soon-to-be 5-year-old will start Little Hearts next. I'm planning on August if not before. It sort of depends on how smoothly things are going with my oldest. I personally really like Little Hearts for Kindergarten, but everyone has a different preference. She has already completed her phonics work and is using the 1st grade options for thinking skills. I love that I can give my girls the pace they need, be it faster or slower than traditional school.
Then will come Little Hands with my 2-year-old (will be three in October). She surprised me this week by already knowing about 10 of her letters by sight and the sounds of a few as well! I'm only going to be doing this 2-3 days a week, so it will basically be half speed. She's still young, but BEGGING to do lessons every day
Since she desires something and already sits well during lessons if I give her something to do, I want to give her the structure.
I've used both of the younger two programs before and they don't take long at all in the scheme of a homeschooling day. I'm also planning on allowing my oldest to do some of the Little Hands things with my two-year-old. She shows great ability in teaching and leadership, so I'm wanting to let her try it out. I think I'll allow her to do the Bible Story and questions (I LOVE the New Bible in Pictures for this age!) and also teach her the memory verses from the ABC memory verse book.
I hope your year runs smoothly!
Melissa (Pastor's wife in NC)http://gracefilledhomeschooling.blogspot.com
Rose (7-years-old) - Bigger Hearts, piano, voice
Beth (5-years-old) - Little Hearts for His Glory piano, voice
Grace (3-years-old) - Little Hands to Heaven