Fold the Crumb Cake Cardstock in half at the score line. Burnish well with your bone folder.
Using the 5-1/4" x 8-1/4" scored piece of Very Vanilla Cardstock, line up the largest "pop-up" die so that the 2 arrows are lined up on the score line. (See video for more details.) Run through the Stampin' Cut & Emboss Machine to create the pop-up mechanism.
Leaving the Very Vanilla cardstock flat, stamp the sentiment of choice on the right side using Calypso Coral ink. Adhere the 2 pieces of 1" x 1" Brushed With Beauty onto the squares on the pop-up mechanism.
Carefully fold the card in half with the pop-up mechanism popping out. Make sure all score lines are well burnished. Adhere to the inside of the card base, being careful to not adhere adhesive too close to the pop-up mechanism so that you don't glue it shut.
Adhere the 4" x 5-1/4" piece of Brushed With Beauty paper to the front of the card.
Using the 2-1/4" x 3-3/4" piece of Very Vanilla cardstock, stamp the sentiment at the bottom of the cardstock using Calypso Coral ink. Above that, stamp the vase using Crumb Cake ink. If desired, mask the top of the vase (see video) and stamp the set of 4 flowers using Black Memento ink.
Stamp the bold "petals" stamp onto the open floral image using Flirty Flamingo ink. Stamp the inside of the flowers using Petal Pink ink. Color in the leaves using the Light Granny Apple Green Blend.
Adhere the stamped Very Vanilla cardstock to the 2-1/2" x 4" Crumb Cake mat and then adhere to the front of the card.
Using the scrap of Very Vanilla cardstock, stamp the small flower using Black Memento ink 3 times. Color in using the Flirty Flamingo or the Petal Pink stamps. Color in the leaves using the Light Granny Apple Green Blends. Run through the Cut & Emboss Machine and die-cut using the corresponding die from the Pop-Up Petals Bundle Dies.
Run the scrap of Crumb Cake cardstock through the Cut & Emboss Machine and die-cut the "flap" die (see video - this die cuts out 2 pieces.) Fold each piece in half and burnish well, apply glue to one inside of the flap and adhere to the back side of the pop-up mechanism. Optional: you can also glue down the front flap but I prefer to leave this "open and unglued."
Using small dots of glue, glue the 3 flowers inside the pop-up box at varying heights are desired.
Refold card base again and burnish all folds well to finish.