Square 
To dream of a square implies that you should be more grounded and consistent in your life. It symbolizes power and toughness. Perhaps something is preventing you from communicating your feelings or opinions.
Sweets
To dream of sweets symbolizes excess pleasure, eroticism, and prohibited fantasies. You may be denying yourself something that you really desire. It may also represent gifts and treats that you have received. This dream could also be referring to a significant other.
Trowel
To dream of a trowel indicates kindness and love that you give to other people.
Wheels
To dream of rotating wheels is an indication that your life has become commonplace. You follow the same path each day. You changing little and grow little. You must inject spontaneity and fun into your routine or risk stagnation.
Boxcar
To dream about a boxcar or cable car foretells that you will earn enough money to live as you wish.
Diaper
To dream about a diaper suggests that you are being too reliant on people around you.
To dream that you are changing diapers indicates that you should improve your demeanor or the childish ways in which you act. You could have a poor outlook for a new job or task.
To dream about dirty diapers suggests that you must take care of a situation that you created with childish actions.
Lentil
To dream of lentils means that you are in an unhealthy and unsupportive environment that emotionally strains you.
Gender
To dream about your gender implies that you're having trouble determining your role in society. You may be lately feeling overly self-conscious about how you're perceived by others. If you're a male and dream of seeing yourself as a female, it indicates the need for nurturing. If you're a female disguised as a male in your dream, it indicates the need for protection and support.
Obelisk
To dream of an obelisk symbolizes indifferent and harsh character. It also means a need to warm up to others and to refine your character.
Dreaming of an obelisk may also suggest genital/sexual insinuation.